Let's divide 78778181 by 391
Our goal is to divide 78778181 by 391.

Advancing to step 1:
7 divided by 391 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 391

Let's proceed to step 2:
If we divide 78 by 391, we get 0 and a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Take the next digit (7) from the dividend and append it to 78, then repeat: 787 / 391

Going ahead to step 3:
391 goes into 787 2 times with a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 5 after subtracting 782 from 787.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 391

Step 4:
391 goes into 57 0 times with a remainder of 57.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtracting 0 from 57 leaves us with 57.
Bring next digit (8) of the dividend behind the 57 and repeat the process: 578 / 391

Let's proceed to step 5:
If we divide 578 by 391, we get 1 and a remainder of 187.
Record the quotient 1 as the next digit in the result. 
Result so far: 201.0
If we subtract 391 from 578, we get 187.
Append the next digit (1) from the dividend to 187 and continue with: 1871 / 391

Let's proceed to step 6:
The number 391 fits into 1871 4 times, leaving a remainder of 307.
Put 4 as the next digit of the answer. 
Result so far: 2014.0
If we take 1564 away from 1871, we end up with 307.
Take the next digit (8) from the dividend and append it to 307, then repeat: 3078 / 391

Let's proceed to step 7:
391 goes into 3078 7 times with a remainder of 341.
Use 7 as the next digit of our solution. 
Result so far: 20147.0
If we subtract 2737 from 3078, we get 341.
Fetch the next digit (1) from the dividend, attach it to 341 and continue: 3411 / 391

Step 8:
3411 divided by 391 is 8 with a remainder of 283.
Put 8 as the next digit of the answer. 
Result so far: 201478.0
If we take 3128 away from 3411, we end up with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

Step 9:
When dividing 2830 by 391, we get 7 with a remainder of 93.
Use 7 as the next digit of our solution. 
Result so far: 201478.7
Subtract 2737 from 2830 to get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 10:
If we divide 930 by 391, we get 2 and a remainder of 148.
Put 2 as the next digit of the answer. 
Result so far: 201478.72
Deduct 782 from 930 and we're left with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Let's proceed to step 11:
391 goes into 1480 3 times with a remainder of 307.
Use 3 as the next digit of our solution. 
Result so far: 201478.723
If we subtract 1173 from 1480, we get 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

On to step 12:
If we divide 3070 by 391, we get 7 and a remainder of 333.
Write down 7 as next digit of the result. 
Result so far: 201478.7237
Subtracting 2737 from 3070 leaves us with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

On to step 13:
3330 divided by 391 is 8 with a remainder of 202.
The number 8 becomes the next digit in our result. 
Result so far: 201478.72378
If we take 3128 away from 3330, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Moving on to step 14:
391 goes into 2020 5 times with a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 201478.723785
Subtract 1955 from 2020 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 15:
If we divide 650 by 391, we get 1 and a remainder of 259.
Write down 1 as next digit of the result. 
Result so far: 201478.7237851
The remainder is 259 after subtracting 391 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Let's proceed to step 16:
The number 391 fits into 2590 6 times, leaving a remainder of 244.
Write down 6 as next digit of the result. 
Result so far: 201478.72378516
The remainder is 244 after subtracting 2346 from 2590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Our division results in 201478.72378516 with a remaining 2.44e-07.